NAT Address Translation Calculator
Plan and configure Network Address Translation (NAT) for your network infrastructure
NAT Configuration
One-to-one mapping between private and public IPs
How to Use the NAT Calculator
1. Enter IP Addresses: Input your private IP address and the public IP address for NAT translation
2. Configure Ports: For static and PAT NAT, specify the private and public port numbers
3. Select NAT Type: Choose between Static, Dynamic, or PAT based on your requirements
4. Choose Protocol: Select TCP, UDP, or both protocols for the NAT rules
5. Calculate: Click calculate to generate subnet information and iptables rules
6. Copy Results: Use the copy buttons to copy any result to your clipboard
NAT Types Explained
Static NAT
One-to-one mapping between private and public IPs. Each private IP gets a dedicated public IP.
Use case: Web servers, mail servers
Dynamic NAT
Maps private IPs to a pool of public IPs dynamically. No port translation.
Use case: Multiple internal hosts needing internet access
PAT (Port Address Translation)
Multiple private IPs share one public IP using different ports.
Use case: Home routers, small offices
Private IP Address Ranges
• Class A: 10.0.0.0/8 (10.0.0.0 - 10.255.255.255) - 16,777,216 addresses
• Class B: 172.16.0.0/12 (172.16.0.0 - 172.31.255.255) - 1,048,576 addresses
• Class C: 192.168.0.0/16 (192.168.0.0 - 192.168.255.255) - 65,536 addresses
Common Use Cases
• Web Server Hosting: Use static NAT to map public IP to internal web server
• Remote Access: Configure PAT for secure remote access to internal services
• Load Balancing: Use dynamic NAT for distributing traffic across multiple servers
• Security: Hide internal network structure from external networks
• IPv4 Conservation: Share limited public IP addresses among multiple internal hosts
upvpn LLC
WireGuard is a registered
trademark of Jason A. Donenfeld.